Pump.



I WITNESS-2S ANLE ROCES BY HIS ATTORNEY WITNESSES CHARLES STANLEY ROGERS NVENTOR UNITED STATES PATENT Enron.

CHARLES STANLEY ROGERS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNGR TO THE PROCESS ENGINEERING CGMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CEPO- RATION OF PENNSYLVANIA.

PUMP.

Limites.

Application filed December 9, 1913.

To all vwhom t may concern Be it known that l, CHARLns STANLEY RoGERs, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Pumps, of which the following is a specification.

My invention consists of a pump designed especially for pumping acid or other Corrosiveliquidi, although not restricted t0 such special use, the' object of my invention being to so construct such a pump as to permit removal orreplaeing of the impeller without the necessity of first draining the pump. Tlhis object l attain in the manner hereinafter set forth, reference being had to `the aecompanying drawings, in which- Figure 1 is a vieu'. partly in side elevation and' partly in vertical section, of pumping apparatus `eonstructed in accordance with myY invention: Eig. 2 is an enlarged vertical sectional view ot' part ot the apparatus; Fig. ,3 is a horizontal section on the line a-a, Fig. 2, and Fig. 4 is a view similar to part of Fig. 1 but illustrating my invention as applied to a modified form of pump.

In Figs. 1, 2 and 3 of the drawing, I have illustrated my invention as applied to a ro` tary pump driven -byan electric motor, 1

`representing theleylindrical casing of the pump, 2 the bottom ot=the lsame rigidly secured to or forming part of said cylindrical casing, 3 the rotary impeller, and 4 the top of the easing which is detachably secured to the cylindrical 'member 1 in the manner hereinafter set forth.

The bottom 2 of the casing has. in the present instance. a central openingclosedby Aa plug 5 which constitutes a step bearing for a stud 6 dependingr from the center of the inipeller 3 from which projects upp'ardly'a shaft 7, whereby said impeller is rotated, the upper end of said shaft being connected by a coupling 8 to a short shaft 9 which is adapted to a thrust bearing; 10 and connected by a flexible coupling 11 to the armature shaft 12 of au electric motor stitutes the motive'poiver for the pump and is mounted upon a supporting: trurture 14 of any valable charac-ter. Tl rra flexibhl roupliun as here used is .ended to mean one which will transmi VYver from the shaft 12 to the shaft 9 ithough said sha tts are not in alinemen. ene another.

Specication of Letters Patent.

which con- Patenten Nov. e, reis.

Serial No. 805,585.

The top plate el of the pump casingl has a l(Neutral openingr 15 for the inflow of the ofthe pump and discharge the same iuto the annular chamber 20, from ivhirh it escapes through the discharge pipe 21. Any suitable t'orm of rotary pump may. however, be employed. so longl as the top plate of the same is readily removable and thel impeller can be withdrawn from the pump when said top plate is removed. lnv the present instance, the top plate or" the pump is held in place upon the annular easing 1 by means of screws 22 passing through nuts 23 which are secured to or form part of plates each engaging at each end a hooked lug 25 on the top of the cylindrical easing 1 of the pump, such lugsbeing disposed Within the cylinder 16 but outwardly beyond the periphery of the top 4 of the pump. The nuts 23, however, overlap the top plate of the pump` so that when the screws 22 are properly 1nanipulated they will press downwardly upon said top plate and seat it firmly in its bearing on the cylindrical casing 1 and at the same time will exert upward pressure onthe nuts 23 so as to engage the ends ot their plates firmly with the. hooked lugs Normally, the level of liquid in the reservoir 16 may be at the overflow pipe 19, the liquid flowing from the tank 18 through the pipe 1T into the reservoir 16 and being Withdrawn from the lower portion of the. same Vthrough the central opening 15 in the top withdrawn from the reservoir7 the screws being provided with long stems 24 in order that these operations may be .conducted from a point above the top of the reservoir. The top` plate 4 ofthe pump casing being now unconfined can bereadily as for instance, by means of hooked rods engaging openings26 in said top and the impeller 3 can then be removed by means of its shaft The parts can be 'readily restored to opera@ tive position by reversal of the above described operations.

My invention is not limited-in its application to a rotary pump but can be applied as well to a reciprocating pump having an impeller in the form of a piston or plunger. Such a pump is shown in Fig. 4, the parts corresponding to those of the pump shown in Fig. l being provided with the same reference numerals, distinguished from those of Fig. l by the addition of the letter au `When the pump is intended for pumping The combination of a pump casing having a liquid reservoir extending above the same, a detachable top plate for said pump casing removable through said reservoir, clamp screws for said top plate distributed around the periphery of the same, nuts en- I gaged by said clamp screws, and nut retaining devices distributed around the top plate and open on one side to permit ready insertion or removal of the nuts.

In testimony whereof, I have signed my name to this specification, in the presence ofl two subscribing witnesses.

CHARLES STANLEY ROGERSl- Vitnesses:

KATE A. BEADLE, HAMILTON D. TURNER. 

